Fujitsu is working on a superconducting quantum computer with more than 10,000 qubits. The system should be ready by 2030 and is part of a national Japanese project focused on post-5G infrastructure.
Fujitsu has begun developing a superconducting quantum computer that will contain more than 10,000 qubits. The device should be operational by 2030 and will be based on the STAR architecture, a fault-tolerant architecture developed by the company itself. Fujitsu is initially targeting a system with 250 logical qubits.
The project is part of a broader Japanese research program led by NEDO (New Energy and Industrial Technology Development Organization). The development is being carried out in collaboration with the National Institute of Advanced Industrial Science and Technology (AIST) and RIKEN. The program focuses on the industrialization of quantum technology and runs until 2027.
Spin Qubits
After 2030, Fujitsu plans to continue focusing on scaling up. The company plans to develop a system with 1,000 logical qubits by 2035. It is also researching how multiple qubit chips can be connected to each other. Furthermore, Fujitsu is exploring the possibility of combining superconducting qubits with diamond-based spin qubits.
The STAR architecture on which the system is based was unveiled in August 2024 in collaboration with Osaka University. This architecture supports “early-stage fault-tolerant quantum computing” and uses phase rotation gates. With this, Fujitsu aims to enable practical applications of quantum computing even before achieving a fully fault-tolerant system.
Focus Areas in Development
Fujitsu is focusing on four domains in the development. These include precise qubit production, technology for chip-to-chip connections, high-density packaging and heat reduction, and algorithms for quantum error correction. According to the company, these technologies are essential for building quantum systems at an industrial scale.
Fujitsu has been involved in quantum hardware development since 2021 through the RIKEN RQC-Fujitsu Collaboration Center. A 64-qubit system was previously built there, followed by a 256-qubit system in 2025. With the step toward 10,000 qubits, Fujitsu is taking another step toward more complex and scalable quantum applications.